HP Sprocket flashing red and green lights when plugged in. Won’t turn on otherwise.

@Baxter20
 
Make sure the HP Sprocket is charged.
 
 Restart the Sprocket to clear any errors, and then load genuine Sprocket photo paper.

Turn off the Sprocket, and then remove the paper cover.

Remove any loose photo paper from the input tray, and then make sure the photo paper is in good condition. Remove any severely bent, wrinkled, or torn photo paper from the stack.
   CAUTION: 
Do not try to remove any jammed paper from inside the paper path. This can damage the paper path rollers.

Turn on the Sprocket.
If there is a jammed photo paper, the Sprocket feeds it through the output slot.

Wait until the Sprocket is idle and silent, and then remove any photo paper fed through the output slot.

Reload the photo paper with the HP logos facing down. Make sure to load genuine Sprocket photo paper, or the Sprocket might not print

Replace the paper cover, and then resend the print job.

Keep me posted, how it goes!
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Have a great day!
Cheers:)